String content="I am an Android developer";
SpannableStringBuilder stringBuilder=new SpannableStringBuilder(content);


ClickableSpan clickableSpan=new ClickableSpan() {
    @Override
    public void onClick(View widget) {
        Toast.makeText(MainActivity.this,"可点击",Toast.LENGTH_LONG).show();
    }
    @Override
    public void updateDrawState(TextPaint ds) {
        //去掉可点击文字的下划线
        ds.setUnderlineText(false);
        ds.setColor(Color.parse("#ffffff"))//设置字体颜色
    }
};

//文本可点击，有点击事件
stringBuilder.setSpan(clickableSpan,0,3,Spanned.SPAN_EXCLUSIVE_EXCLUSIVE);
// 设置此方法后，点击事件才能生效
textView.setMovementMethod(LinkMovementMethod.getInstance());
textView.setText(stringBuilder);

Android 开发SpannableString和SpannableStringBuilder的使用详解